Automatic circuit-controlling device.



W. C. YATES (in W. O. LUM. AUTOMATIC CIRCUIT CONTROLLING DEVICE.

APPLICATION FILED SEPT. 22, 1906.

Patented May 10, 1910.

AttLJ.

UNITED STATES PATENT onnien.

wILLrAMc. YATES AND wat age 0. on, or To GENERAL nnncrfsrc ooMrANY, A

oonronAfrron or new YQRK.

AUTQWEE.T1G IRfJUIT-CONTRULLING DEVICE.

Specification of Letters Patent.

Patented May to. 1910.

Application September 22, 1906. Serial No. 335,693.

- fication.

This invention relates to devices for controlling electric motorcircuits, and has for its object the provision of means whereby electriccircuits may be automatically controlled in a reliable, sai'eandeliicient manner.

Our invention relates more specifically to that type of motor control inwhich a plurality of separately actuated electromagnet switches operateto successively cut sections of resistance out of circuit, the switchesbeing controlled by a master controller.

In carryingout our invention, we provide, in connection withelectromagnct, switches, a master controller which operatesautomatically to control the circuits of the switches. The arrangementis such that when a switch is closed in the control circuit, the mastercontroller, which normally is biased to run-' ning. position; is movedto starting position in'oppositionsto a bias, which may be eithergravity or a spring. hen the controller reaches starting position, themotor circuit is closed and at the same time the energizing circuit ofthe master controller is opened.

The controller therefore returns in response to its bias to runningposition, an d as it does so, energizes the snow ve itchcs to affect themotor circuit, to instance, by cutting out starting resistance. Thedeenergizing of the master controller is accomplished by one of theelectromagnetic switches which opens the energizing circuit of thecontroller simultaneously with the closing of the motor circuit. We alsoprovide means whereby each magnetic switch as it closes, opens thecircuit of the preceding switch, thereby making a more durable andreliable device and at the sann; time simplifyingtl'lBCOIlSt-IllCl'lOll.

In theaccompanying dra ring, in which for purposes of illustration wehave shown our invention embodied in a certain specific structure, 1 and2* represent the mains.

supplying current to a motor armature A havinga field 1*. A series ofresistances R R and R are provided for startii'ig the niotor, thearrangement being such that When the switch 3 is clos d, theseresistances are in series with the motor armatitre. These resistancesareprovid ed with "electromagnetic switchess s and S adapted successively out these resistances out of circuit. Switches S and S each havean actuating coil, while switch S has in addition to the actuating coila holding coil 4%, for purposes hereinafter described. A switch 8* islikewise provided for closing the motor armature circuit, which switchis also provided with a holding coil 5. Each of these switches isprovided with a-brid'ging contsctor, re spectively, 6, 7, 8 and 9'adapted to bridge corresponding contacts. Switches if, S and S each havean additional contactor 1O, 11 and 12, respectively, arranged controlthe circuits of the magnet coils.

The master controller whereby the various switches are controlled,comprises a movable element 14 moving over the contacts 1, 2, 3 and 4:on one side and contacts 15 and 16 opposite thereto. The movable element13 forms a core for the energizing coil 1 7 for moving the element 14:upward, and a dashpot 18 is provided for retarding the element as itfalls. The contacts 1, 2, 3 and 4 connect with the switches S S S and Srespectively, so that they are energized in this order as the contactormoves downward. The contact strip 15 is connected with one side of theline while the contact 16 is connected with the same side of the linethrouglrcontactor 12. A no mally open switch 19 isprovid'ed in the cotroll-er circuit for starting the motor, and norms-Hy closed switch 20also in the co; cirroller cuit is provided for stopping the mo circuitbreaker 21 is likewise vided to protect the circuit in the usual Thearrangement of the circuits and the mode of operation is as follows: Themain switch 8 being closed and it being desired to start-the motor, theswitch 19, which may" sonnnncrnnr, new roan, nss'ronoiis',

.75 element 13 having a contactor or controlling be a push button or anysimilar switch, is closed. This causes the coil 17 of the mas tercontroller to be energized from the positive side of the line l through.conductor 22, eontoctor l2 and conductor 23 to the coil and back throughconductor 32 and switch 19 to the other side of the line at Coil 17being energized, the contsctor 14: is moved 11 Ward, the daslnpot l8be'ng;- so arranged t at the rod 17 will move in lbs ever, will not dropsince is hel the current will 'is upward movement,

2 reaches its upper position seis 1 and 16. This goerating coil of the slZGCl, thecurrent DaSSlIig ...rozn the 9 main through contacter S},coiuhicro contacts 16 and 1 thence-by CODfilUC'Lo the coil, thence byconcluci'or 2 switch 2% hack '1 The energizing ihe swiici b' to raiseits core, thewshyhridg'n; tacts 25" and closing ihe HTHJiOEJ m at thsame iimc opening;- con'iaclor opening this cont-actor, it will heenergizes coil 11R and fire con i upon begins to fall by graviiy tardeclby the desirpot 1S.

opening of the contaetor 1' the actuating coil of switch opened sincethe circuit of l through the contactor 12.

the holding coil 5, win -h, whil cient to raise he core, is suihc vi it.This coil is cormecled permanent cuit across the line through the. Thecont-actor lei as it drops will 11' contact- 2 and couiect strip 13.cause the eiiei'gixing of the switch conductor 26 contact and a tor 27,eturning to the opposite of line at 28 through contactor l0, ihe

S being energized, the section of esstamre R ill be short-circuited bythe bridging; contii 6 so that the current of the motor will p-ass frommain 1, across bridging contact 6, through resistances R and through thearmature A, across contaczs 25 and back to the main line at 2. Thecontactor 1e continuing to drop bridges rho contacts 15 and 8 whereuponthe coil of switch S will be energized from contact 3., throughconducior 29, thence througi'i contactor 11, to the main line at 28.This ili cut out the section of resistance 1* pass from main rectly tojunction 30 and thence the bridging contact 7 to resistance before. Itwill be seen new that is c rent clo'es nol pass through con-sacs and thecircuit ofsivi'tch S is opened at conlactor 10 switch ates. iVhen thecontactor 1% reaches the lower contact 4, the'lower coil of switch Willhe energized through conductor 31, the energizing current passing back Ithe olher side of the line fihrough con'tactor The lower coil of switchS being energized, the section of resistance 1 3 will be out out, and atthe same time by the opening of contactor 11, the operating coil of thissriich will be deenergized. The sWitch,'hoWeVer,

e connected in series with contsctor ,zi Clip and (les lion l .nis on.-

"'re secure eler lion an elect-ro s. a by one of said. a s! circuit, ofmeans c inprising separz lc i controliin r element normally 111. posi-1% ion an ele r'in i one oi sa' 7 for new position, 211

iii? aut-.,-ma'tically in or c and connecuions swi are successivelyope-r element iiireiurns to said posi' 3. The co: 3 nation Witt icircuit, oi comprising netic switches in said circuit, a controllingelement biased to running position, an electrically controlled devicefor moving said element to starting position, and connections wherebysaid device is denergized and one of said-switches simultaneouslyoperated to affect the circuit when said element reaches startingposition.

4. The combination with an electric motor circuit, of means forcontrolling the same comprising a plurality of electromagnetic switchesin the motor circuit, an automatically operated electrically controlleddevice for successively energizing said switches to affect the motorcircuit, and connections whereby certain of said switches are eachdeener 'ized by the actuation of the next succeeding switch.

5. The combination with an electric motor circuit, of means forcontrolling the same comprising a plurality of electromagnetic switchesin the motor circuit, an electrlcally controlled device for successivelyenergizing said switches to affect the motor circuit, and connectionswhereby certain of said switches are eachdenergized by the actuation ofthe next succeedin switch.

6'. The COIIlbl tion with an electric motor circuit, of means forcontrolling the same comprising'iseparately actuated electromagneticswitches in said circuit, a controlling olemcnt biased to runningposition, an electrically controlled device for moving said elelnent tostarting position, mr ns whereby said device is denergized by theactuation 'of one of said switches, and connectionsswitches aresucceswhereby the remaining 1 t t t e emen as 1 re urns sively operatedby sai to running position.

7 The combination with an electric motor circuit, of means forcontrolling the same comprising separately actuated electromagneticswitches in said circuit, a controlling element biased to runningosition, an eleccomprising a master controller having a bias to runningposition, electrically controlled means for moving said controller tostarting position, electromagi'ietic switches actuated as the controllermoves to running position, and connections whereby the actuation of oneof said switches causes the movement of the controller to runningposition.

9. An automatic starter for electric motors comprising amastereontroller having a bias to running position, electricallycontrolled means for moving said controller to starting position,electromagnetic switches actuated by the movement of the controller torunning position, connections whereby the actuation of one of saidswitches causes'the movement of the controller to running positionfandmeans whereby certain of said switches are each deenergizerl by theactuation of the next succeeding switch.

In witness whereof, we have hereunto set our hands this 21st day ofSeptember, 1906.

WILLIAM G. Yarns.

WALTER O. LUM.

. Witnesses 1 BENJAMIN B. HULL,' HELEN ORFORD.

